Serious question about Grey Tree Frog!!

[NeoLover]

My adult is gray and my young one is a brown color. They change color based on a number of reasons like temperatures, diet, stress levels, ect. But it is totally normal. And it could also do with the colors he's exposed to in the cage. When they're kept with lots of plants they turn a green color to blend with the leaves. One's exposed to mostly woody colors are browner.

[Tubby0512]

I have green moss on the bottom of his tank, bark, couple of sticks, fish decoration. He is always a grey color sometimes brownish but never green. Sadly I have to take him to the vets Thursday. He has this lump on his lip and it looks horrible.